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Finding the Fourth Proportional to 1,772.90, 2,659.35 and 1,340.90

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Solution

The fourth proportional to 1,772.90, 2,659.35 and 1,340.90 is: 2,011.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.90 : 2,659.35 = 1,340.90 : x
  2. Step 2: Convert to fraction form
    1,772.90/2,659.35 = 1,340.90/x
  3. Step 3: Cross multiply
    1,772.90x = 2,659.35 × 1,340.90
  4. Step 4: Simplify right side
    1,772.90x = 3,565,922.42
  5. Step 5: Solve for x
    x = 3,565,922.42/1,772.90
  6. Step 6: Final answer
    x = 2,011.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.